Official BOS Trial 2015 Thread (4 Viewers)

Drsoccerball · Oct 2, 2015

porcupinetree said:
Anyway, what's the bet that Ekman got over 70 in the 4U test?

I think he just scraped under 70. We had 2 mutual multiple choice answers... one of us screwed up big time. LOL guess who it is...

porcupinetree · Oct 2, 2015

Drsoccerball said:
I think he just scraped under 70. We had 2 mutual multiple choice answers... one of us screwed up big time. LOL guess who it is...

Lol how do you think you went overall tho? Tbh I reckon I probs got around 40-45% for 4U, as long as marking isn't ridiculously harsh

Drsoccerball · Oct 2, 2015

porcupinetree said:
Lol how do you think you went overall tho? Tbh I reckon I probs got around 40-45% for 4U, as long as marking isn't ridiculously harsh

I reckon its possible to scrape to 50% if the markers mark kindly... This is my reaction when i saw question 14...

Librah · Oct 2, 2015

It's only BOS trials

Ekman · Oct 2, 2015

Perfect representation of me in the exam:

Mr_Kap · Oct 2, 2015

Where can I download the past BOS trials again. I deleted them off my computer after I raged at the difficulty of the exam, but I want to try again, and can't remember where I donwloaded them from.

DatAtarLyfe · Oct 2, 2015

Ekman said:
Perfect representation of me in the exam:

from the praise im hearing about you i dont think you struggled as much as the others did

InteGrand · Oct 2, 2015

Drsoccerball said:
$2016-1=2015$

$$ Use above, to find the least positive value of k such that $ 2015^{2015} +k $ is divisible by $ 3$

I got k =1 ? hbu guys?

$Lol this Q is easier to do without using that imo: simply $2015 \equiv -1(\mod 3)\Rightarrow (2015)^{2015}\equiv (-1)^{2015}\equiv -1 (\mod 3)$, so $k=1$ is smallest to get to 0 (mod 3), which is what divisible by 3 means. However, this provides an easy way to get the answer, and to check your answer as well.$

$(It also seems a bit ambiguous to me to say ``use above'' for the fact $2016 -1 = 2015$. I guess they wanted this? Just saying that from factorisation, $2015 + 1 =2016 | 2015^{2015} + 1$ doesn't seem to ``use'' that fact much tbh. It would've been more of a ``use'' maybe if they'd made the fact to ``use'' this: ``2016 is divisible by 3''.$

$Wait, I guess what was intended was saying $2016-1 = 2015 \Rightarrow (2016-1)^{2015}=2015^{2015}$, and by expanding the L.H.S. we see it consists of powers of 2016 (which are all divisible by 3 as 2016 is divisible by 3), except for the last term of $(-1)^{2015} = -1$, so we need to add $\underline{1}$ in order to get that term to 0, so the whole thing is divisible by 3, and so the answer is 1. This is essentially the same thing as the method in first paragraph.$

DatAtarLyfe · Oct 2, 2015

Mr_Kap said:
Where can I download the past BOS trials again. I deleted them off my computer after I raged at the difficulty of the exam, but I want to try again, and can't remember where I donwloaded them from.

its under the resources tab

Mr_Kap · Oct 2, 2015

DatAtarLyfe said:
its under the resources tab

Not the 2014 BOS Trial. I remember downloading a zip file with 2u, 3u and 4u with like the past 2/3 years or something

DatAtarLyfe · Oct 2, 2015

Mr_Kap said:
Not the 2014 BOS Trial. I remember downloading a zip file with 2u, 3u and 4u with like the past 2/3 years or something

yeh i remember to, its in a thread somewhere but i cant remember which one
You can still find the 2012, 2013 and 2014 trials under the resource tab for all the 3 levels

Mr_Kap · Oct 2, 2015

DatAtarLyfe said:
yeh i remember to, its in a thread somewhere but i cant remember which one
You can still find the 2012, 2013 and 2014 trials under the resource tab for all the 3 levels

IT's in the original post of this thread...lol.

How dumb am I.

rand_althor · Oct 2, 2015

DatAtarLyfe said:
yeh i remember to, its in a thread somewhere but i cant remember which one
You can still find the 2012, 2013 and 2014 trials under the resource tab for all the 3 levels

It is in the first post of this thread. Here is a direct link: BOS Trials.zip

Mr_Kap · Oct 2, 2015

rand_althor said:
It is in the first post of this thread. Here is a direct link: BOS Trials.zip

Yeh i just realised (posted just before you). Was looking everywhere for it and it was right there.

DatAtarLyfe · Oct 2, 2015

rand_althor said:
It is in the first post of this thread. Here is a direct link: BOS Trials.zip

rand why didnt you do the trial today?

rand_althor · Oct 2, 2015

DatAtarLyfe said:
rand why didnt you do the trial today?

I wasn't really bothered to travel there. Figured I could do it when it comes online anyway.

keepLooking · Oct 2, 2015

Mr_Kap said:
Not the 2014 BOS Trial. I remember downloading a zip file with 2u, 3u and 4u with like the past 2/3 years or something

http://community.boredofstudies.org...official-bos-trial-2015-thread-bos-trials.zip

lita1000 · Oct 2, 2015

When's Carrot going to upload the papers?

DatAtarLyfe · Oct 2, 2015

rand_althor said:
I wasn't really bothered to travel there. Figured I could do it when it comes online anyway.

i reckon you couldve got 70%
How's the HSC prep?

Speed6 · Oct 2, 2015

Official BOS Trial 2015 Thread (4 Viewers)

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